1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <unistd.h> 4 #include <errno.h> 5 6 #include <cutils/iosched_policy.h> 7 8 static char *classes[] = {"none", "rt", "be", "idle", NULL}; 9 10 int ionice_main(int argc, char *argv[]) 11 { 12 IoSchedClass clazz = IoSchedClass_NONE; 13 int ioprio = 0; 14 int pid; 15 16 if(argc != 2 && argc != 4) { 17 fprintf(stderr, "usage: ionice <pid> [none|rt|be|idle] [prio]\n"); 18 return 1; 19 } 20 21 if (!(pid = atoi(argv[1]))) { 22 fprintf(stderr, "Invalid pid specified\n"); 23 return 1; 24 } 25 26 if (argc == 2) { 27 if (android_get_ioprio(pid, &clazz, &ioprio)) { 28 fprintf(stderr, "Failed to read priority (%s)\n", strerror(errno)); 29 return 1; 30 } 31 fprintf(stdout, "Pid %d, class %s (%d), prio %d\n", pid, classes[clazz], clazz, ioprio); 32 return 0; 33 } 34 35 if (!strcmp(argv[2], "none")) { 36 clazz = IoSchedClass_NONE; 37 } else if (!strcmp(argv[2], "rt")) { 38 clazz = IoSchedClass_RT; 39 } else if (!strcmp(argv[2], "be")) { 40 clazz = IoSchedClass_BE; 41 } else if (!strcmp(argv[2], "idle")) { 42 clazz = IoSchedClass_IDLE; 43 } else { 44 fprintf(stderr, "Unsupported class '%s'\n", argv[2]); 45 return 1; 46 } 47 48 ioprio = atoi(argv[3]); 49 50 printf("Setting pid %d i/o class to %d, prio %d\n", pid, clazz, ioprio); 51 if (android_set_ioprio(pid, clazz, ioprio)) { 52 fprintf(stderr, "Failed to set priority (%s)\n", strerror(errno)); 53 return 1; 54 } 55 56 return 0; 57 } 58
